Inverter



FIG. 1 is a top perspective view of an inverter showing our new design;

FIG. 2 is a top plan thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a bottom plan view thereof:

FIG. 5 is a front elevation view thereof; and,

FIG. 6 is a rear elevation view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

The ornamental design for an inverter, as shown and described. 